Seamus Costello
E160042
Seamus Costello was an Irish republican socialist leader and militant who played a key role in the split from the Official IRA and became a founding figure of the Irish National Liberation Army.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Seamus Costello canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T863163 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Seamus Costello Context triple: [Irish National Liberation Army, foundedBy, Seamus Costello]
-
A.
Darragh MacAnthony
Darragh MacAnthony is an Irish businessman best known as the long-serving and outspoken owner and chairman of English football club Peterborough United.
-
B.
Liam Lynch
Liam Lynch was a prominent Irish republican military leader who served as chief of staff of the anti-Treaty IRA during the Irish Civil War.
-
C.
Mark Durkan
Mark Durkan is an Irish nationalist politician from Northern Ireland who served as leader of the SDLP and as Deputy First Minister in the Northern Ireland Executive.
-
D.
Donal McLaughlin
Donal McLaughlin was an American architect and industrial designer best known for creating the iconic emblem of the United Nations.
-
E.
Kieran Doherty
Kieran Doherty was an Irish republican and Provisional IRA member who died on hunger strike in 1981 while serving as a Teachta Dála (member of the Irish parliament).
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Seamus Costello Target entity description: Seamus Costello was an Irish republican socialist leader and militant who played a key role in the split from the Official IRA and became a founding figure of the Irish National Liberation Army.
-
A.
Darragh MacAnthony
Darragh MacAnthony is an Irish businessman best known as the long-serving and outspoken owner and chairman of English football club Peterborough United.
-
B.
Liam Lynch
Liam Lynch was a prominent Irish republican military leader who served as chief of staff of the anti-Treaty IRA during the Irish Civil War.
-
C.
Mark Durkan
Mark Durkan is an Irish nationalist politician from Northern Ireland who served as leader of the SDLP and as Deputy First Minister in the Northern Ireland Executive.
-
D.
Donal McLaughlin
Donal McLaughlin was an American architect and industrial designer best known for creating the iconic emblem of the United Nations.
-
E.
Kieran Doherty
Kieran Doherty was an Irish republican and Provisional IRA member who died on hunger strike in 1981 while serving as a Teachta Dála (member of the Irish parliament).
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
Irish republican
ⓘ
paramilitary leader ⓘ person ⓘ politician ⓘ socialist ⓘ |
| activeIn |
Irish republican movement
ⓘ
The Troubles ⓘ |
| associatedWith |
Irish National Liberation Army
ⓘ
Irish Republican Socialist Party ⓘ Official Sinn Féin ⓘ |
| causeOfDeath | assassination ⓘ |
| conflict |
Northern Ireland conflict
ⓘ
linked to:
The Troubles
|
| countryOfCitizenship | Ireland ⓘ |
| dateOfBirth | 1939 ⓘ |
| dateOfDeath | 1977 ⓘ |
| familyName | Costello ⓘ |
| founderOf |
Irish National Liberation Army
ⓘ
Irish Republican Socialist Party ⓘ |
| fullName | Seamus Costello ⓘ |
| givenName | Seamus ⓘ |
| ideology |
Irish republicanism
ⓘ
republican socialism ⓘ socialism ⓘ |
| knownFor | advocacy of armed struggle combined with socialist politics ⓘ |
| mannerOfDeath | killed by gunshot ⓘ |
| memberOf |
Irish Republican Army
ⓘ
Official Irish Republican Army ⓘ |
| movement | Irish republican socialist movement ⓘ |
| nationality | Irish ⓘ |
| notableFor |
founding figure of the Irish National Liberation Army
ⓘ
key role in the split from the Official IRA ⓘ leadership in Irish republican socialist politics ⓘ |
| occupation |
paramilitary commander
ⓘ
political activist ⓘ |
| opposedTo |
British rule in Northern Ireland
ⓘ
partition of Ireland ⓘ |
| placeOfBirth | Bray, County Wicklow, Ireland ⓘ |
| placeOfDeath |
Dublin, Ireland
ⓘ
linked to:
Dublin
|
| politicalAlignment | far-left ⓘ |
| positionHeld |
Chief of Staff of the Irish National Liberation Army
ⓘ
leader of the Irish Republican Socialist Party ⓘ |
| religion | Roman Catholicism ⓘ |
| residence | Bray, County Wicklow, Ireland ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Seamus Costello Description of subject: Seamus Costello was an Irish republican socialist leader and militant who played a key role in the split from the Official IRA and became a founding figure of the Irish National Liberation Army.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.